Single photons with EM37
(Et-E)/Et HISTOS for 12 different cuts in eta: between eta=0 and 2.4 with step 0.2
Note: we are applying cuts on the crack region (eta=1.37 to 1.52). The strategy is to require that the projected eta for the final electron/positron as it reaches the EM calorimeter falls outside this range. Note that this eta is different from the abscissa, which represents the eta of the conversion point.
Another note: we are doing a gaussian fit for the data that falls between -0.3 and 0.3 in order to avoid the tail events. All values can be adjusted in the ROOT script.

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